An Older Adult Patient Admitted with Malnutrition Begins to Demonstrate

An older adult patient admitted with malnutrition begins to demonstrate signs of pneumonia.The nurse would explain which possible etiology of this pneumonia?

A) There is a lack of nutrients to support immune function.
B) Insufficient fluid intake has allowed bacteria to grow.
C) The patient's malnutrition resulted from poor living conditions making infection more likely.
D) Poor nutrition has resulted in a deficiency of vitamin C.